How to use xml_grep to get the value of an attribute?

view story

http://www.unix.com – I'm using xml_grep command to get the value of different tags in a xml-file. No i also need the value of an attribute in a tag. Can I use xml_grep for this? Does anybody know how? ex. : <Name xmlns:xsi="http://www.w3.org/2001/XMLinst" xsi:spaceSchema="Name_5879.xsd"> ... /Name> I need the value of xsi:spaceSchema > Name_5879.xsd (HowTos)